Build a script where i can change an old password to new password

So my original idea was basically a script where I would direct the path of the directory and have a loop program where it would…

a. Open up the file, if opens without password, then close; go to next file;

b. Open up the file, if requires a password, use old password 1, replace it with new password, then close; if old password 1 fails, then use old password 2, replace it with new password, then close; if old password 2 fails, then use old password 3, replace it with new password; repeat.

c. When done, if it could generate a report letting me know which files cannot be opened either without password, or with the “new password”.

d. NOTE: if file is opened/being used by someone, skip and note it as “used by” so I know someone was using that file

The file types are for PDFs and MS Word, and MS Excel. The Word and Excel have various versions, and types (xls, xlsm, etc).

Greetings sir,
how are you today sir? hope fine. Sir,
I have read your project details and i will develop windows software that will loop through folder and open each files (files type that you listed) and if tiFlere

Hi!
how are you?
I am interested in your project.
I read your requirements in detail.
I can do your project well.
I want to discuss about your project and work with you for a long time.
Please contact me.
Best RFlere

Hello, sir
Your job is exciting me.
Let me do this job for you now just to prove my expertise in this field.
Hope I could awake you interest in me. I am always online, work hard and very sensitive to details.
ThankFlere

*** I have checked your description and understood your points.
I can implement to crypt/encrypt for the directory and files.
And I can implement to make office document.(pdf or word or xls).
I will build this app wFlere

Hello
I am highly motivated developer, experienced in C# website and software development.
I have strong knowledge in the following technologies C#, ASP .NET, WPF, Windows Forms
I can surely help you with youFlere

Hello, I read your description and I'll do your work faster and professionally with in your time frame.
Have a look at the websites that I built recently.
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http://www.nikoswings.Flere

Hello,
I can easily create a macro in Excel that can do the requested operations.
The only problem is that I can do it only for MS files (Excel, Word ...no matter which version) but I cannot do it on PDFs.
PleaFlere

hello,how are you. i read your bid carefully.
i am c/c++ expert and have full experience for 10 years.
c++ language is my top skill.
i can provide most quality and high speed.
if you want to success, please contactFlere

Hi, I could help you with this project.
I´m a Java Developer (Backend) But, I really love to work as a FullStack, I've been working with different kind of technologies like Java for about 6 years (JAVA, .NET, Php, Flere

Hello,
i reviewed your requirements and i think i am able to do that. I've done something similiar already for another company i worked for. Their task was to add password protection to all excel and word documents inFlere

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I saw your project description carefully and i'm very interesting your project.
But i have some question about your project.
If u have enough time to discuss about your project with me ,please contact me.
AnFlere

I am Ashok having 10+ years of strong experience on C# application development. I have developed/worked on various complex applications.
I have good experience on multi threading and can develop the application inFlere